Please note that these equations assume that there is
no air gap between adjacent paper layers hence this formulae should not be
used for tissue and some other bulky paper rolls. Actual length may
be less than the calculated length.

Paper Length Calculation when Weight of Roll & Paper
Basis Weight is Known

If you know the net weight (Total weight - Core weight) of the roll and the
Basis weight of the paper, you can calculate the length of paper
using following equations.

Net weight of Paper
M
Width of Roll
W
Basis Weight of Paper
G

Metric or ISO Units (Weight in Kgs, Width in cm and Basis Weight in
g/m2)

English or US Units (Weight in lbs, Width in Inches and Basis
Weight in lbs)

Easiest way is to convert lbs weight in to Basis weight or GSM

To use the Weight Conversion tool, please select a Type of Paper
from the pull down menu, then enter a value in pounds and hit
calculate. To reverse the calculation simply select
"gsm2->lbs" and enter a gsm value.

lbs -> g/m2

g/m2->lbs

Type of Paper

lbs

Grams/Square meter

Point to Paper Weight Conversion (This is true for typical uncoated
paper and assume 12 Pt. thick is equivalent to 270 gsm)

Roll Weight Calculation when Diameter of Roll & Paper Thickness is Known

If you know the outer diameter of the roll and the core on which paper is
wound and the thickness of the paper and basis weight, you can calculate the
weight of paper on roll
using following equations.